~jojo/stalin-bot

c2364c557d429f45b820edc0d3ad60dee86a576c — JoJo a month ago 2a00ced
Using more reliable serenity library w/ songbird

Not 100% on what songbird does, yet, but the example was from their
repo. Some of the voice-stuff i guess.
3 files changed, 2346 insertions(+), 126 deletions(-)

A Cargo.lock
M Cargo.toml
M src/main.rs
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M Cargo.toml => Cargo.toml +6 -1
@@ 6,4 6,9 @@ edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

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songbird = "0.2"
serenity = { version = "0.10", features = ["client", "standard_framework", "voice", "rustls_backend"] }
tokio = { version = "1.0", features = ["macros", "rt-multi-thread", "signal"] }
\ No newline at end of file

M src/main.rs => src/main.rs +347 -125
@@ 1,135 1,357 @@
use discord::model::Event;
use discord::{Discord, State};
//! Requires the "client", "standard_framework", and "voice" features be enabled in your
//! Cargo.toml, like so:
//!
//! ```toml
//! [dependencies.serenity]
//! git = "https://github.com/serenity-rs/serenity.git"
//! features = ["client", standard_framework", "voice"]
//! ```
use std::env;

// A simple DJ bot example.
// Use by issuing the command "!dj <youtube-link>" in PM or a visible text channel.
// The bot will join the voice channel of the person issuing the command.
// "!dj stop" will stop playing, and "!dj quit" will quit the voice channel.
// The bot will quit any voice channel it is the last user in.

pub fn main() {
    // Log in to Discord using a bot token from the environmetns
    let discord = Discord::from_bot_token(&env::var("DISCORD_TOKEN").expect("Expected token"))
        .expect("login failed");

    // establish websocket and voice connection
    let (mut connection, ready) = discord.connect().expect("connect failed");
    println!(
        "[Ready] {} is serving {} servers",
        ready.user.username,
        ready.servers.len()
    );
    let mut state = State::new(ready);
    connection.sync_calls(&state.all_private_channels());

    // receive events forever
    loop {
        let event = match connection.recv_event() {
            Ok(event) => event,
            Err(err) => {
                println!("[Warning] Receive error: {:?}", err);
                if let discord::Error::WebSocket(..) = err {
                    // Handle the websocket connection being dropped
                    let (new_connection, ready) = discord.connect().expect("connect failed");
                    connection = new_connection;
                    state = State::new(ready);
                    println!("[Ready] Reconnected successfully.");
                }
                if let discord::Error::Closed(..) = err {
                    break;
                }
                continue;
// This trait adds the `register_songbird` and `register_songbird_with` methods
// to the client builder below, making it easy to install this voice client.
// The voice client can be retrieved in any command using `songbird::get(ctx).await`.
use songbird::SerenityInit;

// Import the `Context` to handle commands.
use serenity::client::Context;

use serenity::{
    async_trait,
    client::{Client, EventHandler},
    framework::{
        standard::{
            macros::{command, group},
            Args, CommandResult,
        },
        StandardFramework,
    },
    model::{channel::Message, gateway::Ready},
    Result as SerenityResult,
};

struct Handler;

#[async_trait]
impl EventHandler for Handler {
    async fn ready(&self, _: Context, ready: Ready) {
        println!("{} is connected!", ready.user.name);
    }
}

#[group]
#[commands(deafen, join, leave, mute, play, ping, undeafen, unmute)]
struct General;

#[tokio::main]
async fn main() {
    tracing_subscriber::fmt::init();

    // Configure the client with your Discord bot token in the environment.
    let token = env::var("DISCORD_TOKEN").expect("Expected a token in the environment");

    let framework = StandardFramework::new()
        .configure(|c| c.prefix(">> "))
        .group(&GENERAL_GROUP);

    let mut client = Client::builder(&token)
        .event_handler(Handler)
        .framework(framework)
        .register_songbird()
        .await
        .expect("Err creating client");

    tokio::spawn(async move {
        let _ = client
            .start()
            .await
            .map_err(|why| println!("Client ended: {:?}", why));
    });

    tokio::signal::ctrl_c().await;
    println!("Received Ctrl-C, shutting down.");
}

#[command]
#[only_in(guilds)]
async fn deafen(ctx: &Context, msg: &Message) -> CommandResult {
    let guild = msg.guild(&ctx.cache).await.unwrap();
    let guild_id = guild.id;

    let manager = songbird::get(ctx)
        .await
        .expect("Songbird Voice client placed in at initialisation.")
        .clone();

    let handler_lock = match manager.get(guild_id) {
        Some(handler) => handler,
        None => {
            check_msg(msg.reply(ctx, "Not in a voice channel").await);

            return Ok(());
        }
    };

    let mut handler = handler_lock.lock().await;

    if handler.is_deaf() {
        check_msg(msg.channel_id.say(&ctx.http, "Already deafened").await);
    } else {
        if let Err(e) = handler.deafen(true).await {
            check_msg(
                msg.channel_id
                    .say(&ctx.http, format!("Failed: {:?}", e))
                    .await,
            );
        }

        check_msg(msg.channel_id.say(&ctx.http, "Deafened").await);
    }

    Ok(())
}

async fn join_(ctx: &Context, msg: &Message) -> CommandResult {
    let guild = msg.guild(&ctx.cache).await.unwrap();
    let guild_id = guild.id;

    let channel_id = guild
        .voice_states
        .get(&msg.author.id)
        .and_then(|voice_state| voice_state.channel_id);

    let connect_to = match channel_id {
        Some(channel) => channel,
        None => {
            check_msg(msg.reply(ctx, "Not in a voice channel").await);

            return Ok(());
        }
    };

    let manager = songbird::get(ctx)
        .await
        .expect("Songbird Voice client placed in at initialisation.")
        .clone();

    let _handler = manager.join(guild_id, connect_to).await;

    Ok(())
}

#[command]
#[only_in(guilds)]
async fn join(ctx: &Context, msg: &Message) -> CommandResult {
    join_(ctx, msg).await
}

#[command]
#[only_in(guilds)]
async fn leave(ctx: &Context, msg: &Message) -> CommandResult {
    let guild = msg.guild(&ctx.cache).await.unwrap();
    let guild_id = guild.id;

    let manager = songbird::get(ctx)
        .await
        .expect("Songbird Voice client placed in at initialisation.")
        .clone();
    let has_handler = manager.get(guild_id).is_some();

    if has_handler {
        if let Err(e) = manager.remove(guild_id).await {
            check_msg(
                msg.channel_id
                    .say(&ctx.http, format!("Failed: {:?}", e))
                    .await,
            );
        }

        check_msg(msg.channel_id.say(&ctx.http, "Left voice channel").await);
    } else {
        check_msg(msg.reply(ctx, "Not in a voice channel").await);
    }

    Ok(())
}

#[command]
#[only_in(guilds)]
async fn mute(ctx: &Context, msg: &Message) -> CommandResult {
    let guild = msg.guild(&ctx.cache).await.unwrap();
    let guild_id = guild.id;

    let manager = songbird::get(ctx)
        .await
        .expect("Songbird Voice client placed in at initialisation.")
        .clone();

    let handler_lock = match manager.get(guild_id) {
        Some(handler) => handler,
        None => {
            check_msg(msg.reply(ctx, "Not in a voice channel").await);

            return Ok(());
        }
    };

    let mut handler = handler_lock.lock().await;

    if handler.is_mute() {
        check_msg(msg.channel_id.say(&ctx.http, "Already muted").await);
    } else {
        if let Err(e) = handler.mute(true).await {
            check_msg(
                msg.channel_id
                    .say(&ctx.http, format!("Failed: {:?}", e))
                    .await,
            );
        }

        check_msg(msg.channel_id.say(&ctx.http, "Now muted").await);
    }

    Ok(())
}

#[command]
async fn ping(context: &Context, msg: &Message) -> CommandResult {
    check_msg(msg.channel_id.say(&context.http, "Pong!").await);

    Ok(())
}

#[command]
#[only_in(guilds)]
async fn play(ctx: &Context, msg: &Message, mut args: Args) -> CommandResult {
    join_(ctx, msg).await?;
    let url = match args.single::<String>() {
        Ok(url) => url,
        Err(_) => {
            check_msg(
                msg.channel_id
                    .say(&ctx.http, "Must provide a URL to a video or audio")
                    .await,
            );

            return Ok(());
        }
    };

    if !url.starts_with("http") {
        check_msg(
            msg.channel_id
                .say(&ctx.http, "Must provide a valid URL")
                .await,
        );

        return Ok(());
    }

    let guild = msg.guild(&ctx.cache).await.unwrap();
    let guild_id = guild.id;

    let manager = songbird::get(ctx)
        .await
        .expect("Songbird Voice client placed in at initialisation.")
        .clone();

    if let Some(handler_lock) = manager.get(guild_id) {
        let mut handler = handler_lock.lock().await;

        let source = match songbird::ytdl(&url).await {
            Ok(source) => source,
            Err(why) => {
                println!("Err starting source: {:?}", why);

                check_msg(msg.channel_id.say(&ctx.http, "Error sourcing ffmpeg").await);

                return Ok(());
            }
        };
        state.update(&event);

        match event {
            Event::MessageCreate(message) => {
                // println!("message: {:?}", message);
                // safeguard: stop if the message is from us
                if message.author.id == state.user().id {
                    continue;
                }
                // println!("message not from us");

                // reply to a command if there was one
                let mut split = message.content.split(' ');
                let first_word = split.next().unwrap_or("");
                let argument = split.next().unwrap_or("");

                if first_word.eq_ignore_ascii_case("!stalin") {
                    println!("first word was !stalin");
                    let vchan = state.find_voice_user(message.author.id);
                    println!("found {:?} in channel {:?}", message.author, vchan);
                    if argument.eq_ignore_ascii_case("stop") {
                        vchan.map(|(sid, _)| connection.voice(sid).stop());
                    } else if argument.eq_ignore_ascii_case("quit") {
                        vchan.map(|(sid, _)| connection.drop_voice(sid));
                    } else {
                        let output = if let Some((server_id, channel_id)) = vchan {
                            println!("opening ytdl stream...");
                            match discord::voice::open_ytdl_stream(argument) {
                                Ok(stream) => {
                                    println!("opened stream!");
                                    println!("connecting with voice...");
                                    let voice = connection.voice(server_id);
                                    voice.set_deaf(true);
                                    voice.connect(channel_id);
                                    println!("playing stream...");
                                    voice.play(stream);
                                    println!("X");
                                    String::new()
                                }
                                Err(error) => format!("Error: {}", error),
                            }
                        } else {
                            "You must be in a voice channel to DJ".to_owned()
                        };
                        if !output.is_empty() {
                            warn(discord.send_message(message.channel_id, &output, "", false));
                        }
                    }
                }
            }
            Event::VoiceStateUpdate(server_id, _) => {
                // If someone moves/hangs up, and we are in a voice channel,
                if let Some(cur_channel) = connection.voice(server_id).current_channel() {
                    // and our current voice channel is empty, disconnect from voice
                    match server_id {
                        Some(server_id) => {
                            if let Some(srv) =
                                state.servers().iter().find(|srv| srv.id == server_id)
                            {
                                if srv
                                    .voice_states
                                    .iter()
                                    .filter(|vs| vs.channel_id == Some(cur_channel))
                                    .count()
                                    <= 1
                                {
                                    connection.voice(Some(server_id)).disconnect();
                                }
                            }
                        }
                        None => {
                            if let Some(call) = state.calls().get(&cur_channel) {
                                if call.voice_states.len() <= 1 {
                                    connection.voice(server_id).disconnect();
                                }
                            }
                        }
                    }
                }
            }
            _ => {} // discard other events

        handler.play_source(source);

        check_msg(msg.channel_id.say(&ctx.http, "Playing song").await);
    } else {
        check_msg(
            msg.channel_id
                .say(&ctx.http, "Not in a voice channel to play in")
                .await,
        );
    }

    Ok(())
}

#[command]
#[only_in(guilds)]
async fn undeafen(ctx: &Context, msg: &Message) -> CommandResult {
    let guild = msg.guild(&ctx.cache).await.unwrap();
    let guild_id = guild.id;

    let manager = songbird::get(ctx)
        .await
        .expect("Songbird Voice client placed in at initialisation.")
        .clone();

    if let Some(handler_lock) = manager.get(guild_id) {
        let mut handler = handler_lock.lock().await;
        if let Err(e) = handler.deafen(false).await {
            check_msg(
                msg.channel_id
                    .say(&ctx.http, format!("Failed: {:?}", e))
                    .await,
            );
        }

        check_msg(msg.channel_id.say(&ctx.http, "Undeafened").await);
    } else {
        check_msg(
            msg.channel_id
                .say(&ctx.http, "Not in a voice channel to undeafen in")
                .await,
        );
    }

    Ok(())
}

#[command]
#[only_in(guilds)]
async fn unmute(ctx: &Context, msg: &Message) -> CommandResult {
    let guild = msg.guild(&ctx.cache).await.unwrap();
    let guild_id = guild.id;

    let manager = songbird::get(ctx)
        .await
        .expect("Songbird Voice client placed in at initialisation.")
        .clone();

    if let Some(handler_lock) = manager.get(guild_id) {
        let mut handler = handler_lock.lock().await;
        if let Err(e) = handler.mute(false).await {
            check_msg(
                msg.channel_id
                    .say(&ctx.http, format!("Failed: {:?}", e))
                    .await,
            );
        }

        check_msg(msg.channel_id.say(&ctx.http, "Unmuted").await);
    } else {
        check_msg(
            msg.channel_id
                .say(&ctx.http, "Not in a voice channel to unmute in")
                .await,
        );
    }

    Ok(())
}

fn warn<T, E: ::std::fmt::Debug>(result: Result<T, E>) {
    match result {
        Ok(_) => {}
        Err(err) => println!("[Warning] {:?}", err),
/// Checks that a message successfully sent; if not, then logs why to stdout.
fn check_msg(result: SerenityResult<Message>) {
    if let Err(why) = result {
        println!("Error sending message: {:?}", why);
    }
}